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UPS repairs, installations and news

maintaining your uninterruptible power supply battery

By | UPS Battery replacement | No Comments

Battery failure is the leading offender behind most UPS disasters. However regardless of batteries’ vulnerability to early failure, you do not need to be a victim. We’re going to go through the leading 5 reasons for early battery failure and how you can avoid it.

UPS batteries are electro-chemical gadgets whose capability to store and provide power diminishes gradually.

It still surprises me that after having critical equipment installed, some forget to maintain it properly, such as these batteries that were just 2 years old.We were only called to this Brisbane office after smoke was seen, fortunately we got there in time but it could have been more than just batteries they were up for. Had they regular  servicing we would have noticed and replaced the one battery that caused them all to  fail.

No matter how well you preserve, save and utilize your batteries, they will still need replacement when they have actually reached their end of life.

 

Life expectancy of UPS batteries

 

Typically the basic life span of a conventional Valve Regulated Lead Acid (VRLA) battery for uninterruptible Power Supply is either:-

  • typically a small UPS battery has a design life of 3-5 years
  • typically a large UPS battery has a design life of 8-10 years

Nevertheless, there are a variety of ecological, chemical and user-related elements that can significantly impact a battery’s life.

Faulty UPS batteries Sunshine Coast Plaza

How to prevent premature UPS Battery replacement

Whilst nothing can be done to avoid a battery from ultimately reaching its end-of-service life. 
Regular maintenance can prevent UPS failure, disruption to the business and costly premature battery replacement

 

These are the main ASPECTS THAT CAUSE PREMATURE BATTERY FAILURE

 

  1. Eaton UPS battery ReplacementPoor storage of unused batteries– Even as a battery sits unused, its life time starts to reduce. That’s since lead-acid batteries immediately release percentages of energy. To extend a battery’s storage life, we advise you charge it every 3 to 4 months of storage. If you do not, you might see a long-term loss of capability in just 6 months. You can likewise lengthen your unused battery’s storage life by saving it at a temperature level of 50 ° F( 10 ° C)or less.
  2. High ambient temperature level– The rated capability of every battery is based upon an ambient temperature level of 25 ° C Any variation, however particularly enhanced temperature level, can influence efficiency and life expectancy. Battery Manufacturers typically state that temperatures over 25 C can severly damage battery life.
  3. Over-cycling– After a UPS runs on battery power throughout a power failure, the battery charges for future usage, an occasion called the discharge cycle. When a battery is set up, it is at 100 percent of its ranked capability. Nevertheless, each discharge and subsequent recharge a little decreases the capability of the battery.
  4. Incorrect float voltage– Every battery producer will define the charging voltage varieties for their own cell design. If a battery is regularly charged beyond these specifications, it can trigger considerable damage.
  5. Undercharging or low voltage can trigger sulfate crystals to form on the battery plates. These crystals will ultimately solidify and decrease the offered capability of the battery with time.
  6. Overcharging with a float voltage that is expensive can trigger extreme hydrogen and oxygen gases and can cause internal dryout that, as soon as sped up, can trigger thermal runaway– leading to failure and even fire and surge.
  7. Inaccurate battery application– UPS batteries are made particularly for UPS power supply systems, simply as other batteries are made particularly for their particular home appliances. These batteries are developed to provide very high rates of energy for a brief time, usually as much as 15 minutes.

 If you are unsure of your UPS battery condition give us a call today.

Regular servicing prevents UPS malfunction through battery failure

 

The most typical failure mode of a VRLA Battery is an open circuit, frequently brought on by cell dryout. UPS systems normally have actually a SERIES linked battery system to offer a high present to the UPS System DC Bus. If one cell in a string opens, it will break the existing in the whole string. In other words, simply one failed battery cell can lower your whole facilities.

Regular maintenance of your uninterruptible power supply system, as a minimum 6 monthly, but many leading facility companies that understand the critical link of the battery in the power protection system, opt for quarterly servicing.

Experienced UPS service technicians will test each battery during the service and detect if a battery is weakening BEFORE it get to failing completely preventing power loss to critical equipment and occasionally fire through thermal runaway.

UPS Maintenance

By | UPS Maintenance | No Comments

One reason you should have your UPS serviced regularly – Capacitors in UPS systems do fail

 

Fault-capacitor-Brisbane--CHigh quality capacitor producers all all over the world offer a capacitor service life score. The life span score is only a guide  and the number does not have enough

precision to be utilized as a predictor of when the very first capacitor in a bank of capacitors will fail.

 

Capacitor failure designs do exist and will produce a failure time for a certain failure rate however the number includes a huge variation and has a low self-confidence

level.

 

Changing capacitors occasionally is the only method to guarantee a really high MTBF.

for capacitors.

 

All UPS systems  experience in service ageing of their power components and left unattended can

and can trigger UPS systems to move offline, or to a bypass source and create a very expensive repair or total replacement

 

All UPS manufacturers have power components that age and a guideline for replacing them, however it is a guideline and ocasionally they fail sooner rather than later

An experience UPS technician knows the signs to look for when servicing to prevent UPS failure.

 

Typically an online UPS will have 5 main components

 

  1. At the input it will have an AC filter
  2. The filtered AC is converted to DC via a rectifier
  3. A large battery bank and a DC capacitor bank for the DC bus, DC filtering
  4. A DC to AC power inverter
  5. An AC filter at the output

 

So we have both AC and DC capacitors

 

Failure mode for an capacitor found in an uninterruptible power supply.

 

Both capacitor innovations age by losing capacitance and establishing thus greater internal resistance.

 

If this procedure is permitted to continue, a point will be reached where the capacitor will fail into a short circuit and will lose the capability to hold up against the statedAC cap Mine Central Queensland

voltage.

 

concerned about your uninterruptible power supply, give us a call 1300 378 884

In addition the capacitor ageing procedure likewise creates gas which increases the internal gas pressure in both capacitor building and constructions.

 

The polymeric film capacitor has a pressure interrupter developed into the case and when the pressure reaches a predetermined value, the interrupter opens within the capacitor

case and detaches the capacitor from the circuitry. The pressure interrupter design for huge polymeric film capacitors are based upon a notched wire which bursts .

 

When the pressure interrupter runs, the capacitor case bulges up and is  noticeable to the trained eye suggesting the capacitor has actually reached end of life and is not in

the circuit.

Other pressure interrupter designs are utilized around the globe however they all open under pressure and detach the capacitor from the circuitry.

 

For DC aluminum electrolytic capacitors, the increase in pressure rises a rubber bung at a pre set pressure.

 

 

Will regular UPS maintenence and servicing decrease the chance of catostrophic failure and lost production time?

 

Ageing capacitors can be spotted during maintenance.

Both DC electrolytic capacitors and AC polymeric film capacitors consist of gadgets which broaden due to gas generation as the capacitor ages

all the swelling happens around the cover which can be seen.

 

Usually the capacitors can that are failing can be spotted and replaced before any damage to the UPS systems presuming the service intervals are regular.

Brisbane-Airport---UPS Capacitor failureIt would be usual to replace the entire capacitor bank when one capacitor has actually experienced substantial in-service aging as capacitor ageing for capacitors within the.

very same UPS system (capacitors within a capacitor bank and for that reason exposed to the very same ageing conditions)

 

When a couple of capacitors reach the end of their life by operation of the pressure interrupter, other capacitors in the bank can see enhanced tension and speeding up aging.

As soon as the very first capacitor in the bank has actually failed the likelihood of added failures is high.

Brisbane CBD lawyers APC Smart Ups repair

By | Brisbane UPS repair | No Comments

Case Study – UPS system failure to Brisbane CBD Lawyer office with storms forcast….

 

We were recently called to a lawyers from our Brisbane office.

Brisbane lawer UPS faultJohn the IT manager stated his issue was  their APC Smart ups 2000 kva rackmount uninterruptible power supply had a battery alarm – even though their local electrician had replaced the batteries about a year ago. When unplugged it emits a “on battery power” constant tone. The power outlets on the back were not receiving any power though. And when switched off and would not restart.

He was concerned as storms were forcast and needed power protection was critical for his Brisbane office servers.

Well when I arrived I wasn’t surprised, it was plain to see the electrician had damaged the display fixing.

There were a few issues with this particular UPS,

  1. Usually electricians not trained in UPS maintenance generally have a limited understanding of UPS maintenance and this was the clearly the case here, where being unfamiliar with this UPS the retaining clips for the display had been damaged whilst attempting to access the batteries.
  2. Batteries had failed – I opened it up and checked the condition of batteries. One was at 9.67Vdc with the remaining at between 10.1-11.3Vdc.
  3. This UPS requires DC for it to run, so if switched off,with failed batteries will not restart

 

 

With  APC smart ups, when changing batteries we also need to modify the battery constants, which simply put, resets the UPS battery monitoring settings.

 

We replaced the batteries with a reputable brand CSB and not the cheap chinese imports that we found, these were only a year old and starting to bulge. We then reset the battery constants, replace the fans and switched on.

 

The UPS was then checked on and offload, the rectifier was checked, the inverter was checked, the battery charger was tested to confirm it was charging correctly and then the output was monitored during mains fail testing.

 

John was happy as it meant his UPS was back online 1.5 hrs after we turned up and his servers were protected for the approaching summer storms Brisbane is well known for.

For more advice on your Brisbane UPS power supply